DEPARTMENT OF COMMERCE 


U.S. COAST AND GEODETIC SURVEY 
E. LESTER JONES, DIRECTOR 


SUPPLEMENT 


TO 


UNITED STATES COAST PILOT 


PHILIPPINE ISLANDS 


PART II 


& PALAWAN, MINDANAO, AND SULU ARCHIPELAGO 


JANUARY 1, 1926 


Notr.—This supplement gives the more important corrections and 
additions to the text of the Coast Pilot volume since its publication. 
ZAll ‘changes, given in previous supplements and not repeated herein, 
are’no longer in effect. The supplement is so printed that it may be 
pouts up and the slips inserted on the pages affected. All new informa- 
? tion should be inserted in such a manner that it can be removed if 
~ changed or canceled by a subsequent supplement. 


WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1926 


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edu ou) aio ithlaysn bie ennl od POY baw andiinie ody od . ol ibis qr 
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* 


IMPORTANT NOTICE.—Supplements to the United States Coast Pilots 
are issued at least once a year and give all available information for 
bringing the Coast Pilots up to date. The Coast and Geodetic Survey must 
depend in a great measure upon outside sources of information pending a 
complete revision of a volume. Mariners and others will therefore realize 
the importance and great desirability of cooperation in this work, and are 
urgently requested to forward to the Director, United States Coast and 
Geodetic Survey, Washington, D. C., directly or through one of the field 
stations of the survey, any information affecting the Coast Pilots or charts 
that may come to their notice, as well as any suggestions that they may 
have for increasing the value of these publications. 


Pace 18. | 

Radio Service—Time signals.—The radio transmission is by a 5- 
kilowatt spark on a wave length of 2,700 meters and by arc on a 
wave length of 5,260 meters. The weather warnings immediately 
follow the time signals. 

Third paragraph, third sentence, substitute the following: “Infor- 
mation concerning the United States commercial radio stations of 
the United States should be addressed to the Bureau of Navigation, 
Department of Commerce, Washington, D. C. For list of the radio 
stations of the United States, including shore'stations, merchant 
vessels, and Government vessels; Radio Communication Laws and 
Regulations of the United States; and Amateur Radio Stations of 
the United States, address the Superintendent of Documents, Gov- 
ernment Printing Office, Washington, D. C.; price 15 cents each, 
excepting Amateur Radio Stations, price 25 cents each.” Changes 
or additions to the stations and to the laws and regulations are pub- 
lished in bulletins issued monthly; price 5 cents per copy or 25 cents 
per year. : 

The International List of Radio Stations of the World (edition in 
English) can be procured from the International Bureau of the 
Telegraphic Union (Radiotelegraphic Service), Berne, Switzer- 
land. In addition to the information contained in the list of the 
United States stations published by the Bureau of Navigation, the 
international list shows geographical locations, normal ranges in 
nautical miles, radio systems, and rates. Supplements to the inter- 
national list will be issued monthly and will contain new stations 
and tables of alterations. Inquiries as to the subscription prices of 
these lists should be made direct to the Berne bureau at the address 
given above. Remittances to Berne should be made by interna- 
tional postal money orders. 


2 


The insular government radio stations are as follows: 


Coastal stations (insular government radio stations) listen in on a 600-meter 
wave length for ship messages about 10 minutes each hour while open for 
business 


Station tude, tude, Wave lengths (meters) 
| letters north east, 
ee Ol Sad i : 2 
| ° fs ° 4, 
BALD sa it) seererer ie pee Ae es KZAD 18 21) 121 38} 550, 600, 1,100, variable. 
Bala bine eee seen on ee ee a | KEW 7 59} 117 04 | 600, 1,200. 
RLOSCOMEEE yee ee oe ee | KZAB} 20 28; 121 59 | 600, 952, 1,200, 1,500, 1,800, 2,400. 
Tepe aties Gf Sa 2 er ae ee Y KPC 13 47 121 00 | 400, 600, 800, 950, 1,200, 1,500, 1,900. 
SOU U meee mma meee met kes |; KEO 5 02}; 119 461 600. 
GE TPA EN che CUS) 0 A Uae Sy gn aa Onn a ese en | KEV Good IR eS 750: 
SeaTac ee ee eee a ek | KZAC } 18 241} 121 11 | 400, 600, 700, 900. 
AUG T livre er Bere set 2s) Sek Kee 10 18 | 123 53 | 600, 750, 950,1,200,1,250,1,600,2.400. 
Ci OMemee er seer SoU OL ied 11 53! 120 O1 | 600, 900. 
SOUT Omen eee eee ey. ets iy beh ae KIX 10 50} 121 00 | 600, 850. 
De ap eee beeen ie) peers it ACG 8. 7 04; 125 87 | 600, 1,100. 
LOU Omar ee eae. teen ee KPM | 10 42) 122 34 | 600, 950, 1,200, 1,600, 1,950, 2,400. 
ssabellanieveasial.o.s. vee ss sole. KPN 6° 42} 121 158! 200. 
TOG eee Ue Oe), eT KIL 6 03, 121 00 | 600, 1,200, 1,905. 
GOS (yi meer eam eee Ne ee KZAJ 13 09 123 45 | 550, 600, 950, variable. 
TAIRA DE Tee Otel. ea cokes He 1 WA 7 35 124 05 | 600, 750, 800, 850. 
ECS ott Ln EEE ST ee een ee wee 7 38 123 02 600. 
NG UGE ba pee tt SOE | aD AS gn KPW 6 24; 125 36 | 450, 600, 700. 
iV eh Piper ar gt peer eh tee ee a KPZ 6 57; 126 14: 600, 952. 
POnUe CL Km eres Lh) vel Oe An KPX 6 33) 124 03 , 600, 1,500, 2,000. 
Pe UOKGOUETIMCRS Ye sane ee eee KIV 9 45; 118 44 | 600, 900. 
ban Francisco Camotes_.-_.-.---2---.- KPY | 10 38] 124 22 | 300, 378, 476, 600, 756, 952. 
SEEHHT AT Lai oie 41 i ne a gD KYY | 12 21) 121 04 | 600, 1,400. 
AAV ECON TOmse ey ee Fe AOAC Sy hs ae eed aie te 550-1,100, 750. 
DSIASi ee eee eS 226 Sek, eS ee KED 5 33] 120 49 | 450, 600, 650. 
UP Tee lyee eerie ms Ne 2d KZAM | 9 48} 125 29 | 550-1,100, 950. 
Wile Ccmreter immer eek GP ae ody KZAH | 13 47/ 124 14 | 600, 750, 950. 
Zamboanga__._... _- Qe Sa iA | KIW | 6 55; 122 02 | 950, 1,250, 1,500, 1,850. 


Add the following paragraphs: 

Radiocompass bearings—Naval radiocompass stations will fur- 
nish radio bearings to mariners of all vessels equipped with radio- 
telegraph transmitters. While the use of these bearings should not 
lead a mariner to neglect other precautions, such as the use of the 
lead, etc., during a fog, these bearings will greatly reduce the dan- 
gers to navigation for mariners who are compelled for any reason 
to proceed during foggy or misty weather. 

These radiocompass stations are provided, primarily, to assist the 
mariner in closing the land during fog or poor visibility, but they 
may also be used to obtain the positions of vessels at sea in radio- 
compass range—about 150 miles—when for any reason positions can 
not be obtained by other means. The maximum distance for which 
bearings from these stations are accurate is 150 miles. But accurate 
positions can not be plotted when more than 50 miles from the 
shore on Mercator charts, for the Mercator projection introduces a 
distortion of the true bearing. 

Radiocompass stations are divided into two classes: (a) Single 
stations, operating independently and furnishing a single bearing. 
(6) Harbor entrance groups. All stations in harbor entrance 
groups are connected to and controlled by the master station. All 
stations of the group take bearings simultaneously, and these bear- 
ings are transmitted to the ship requesting them by the control 
station. 


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agnult ‘sidadoug wet.  addaedieiisis oleae Ye gerisay 
a gasttiicneine ay iB A gle ad} ti hainothe Gal# BE x neo : 
aD TTI" Puts ae y thi otek “oriils Bei) {Ols Daisies 4 if 


Aves. ory Beale “torte ‘Betogpe S40..." pbareriecrea ee 
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ms et kt 4 » % wore : ve inh -s al - 4 
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sali fea thonitaldaned BORN agtNd sare pany teROY ae ae weer ATT. 
he rey Fe a " Te "a4, | +? 1 5 ' - 
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3 


Where only one radiocompass station is available, the mariner 
may fix his position by two or more bearings from the station with 
the distance run between, or may use the bearings as a line of posi- 
tion, or as a danger bearing, or the bearing may be crossed with a 
line of position obtained from an observation of an astronomical 
body to establish a fix. 

Accuracy of bearings——The accuracy with which bearings can be 
taken depends on various conditions and, while bearings taken by a 
station can generally be considered accurate to within 2°, the Gov- 
ernment can not accept any responsibility for the consequences of a 
bearing being inaccurate. 

When three stations, so situated as to give intersecting bearings, 
can be used and the three simultaneous bearings cross with a small 
“triangle of error,” considerable reliance can be placed in the posi- 
tion obtained. 

In the case of bearings which cut the coast line at an oblique 
angle, errors of from 4 to 5° have been reported. Bearings obtained 
between about one-half hour before sunset and one-half hour after 
sunrise are generally unreliable. It is probable that the accuracy 
of a bearing is also affected if the ship’s transmitting instrument is 
not adjusted to the correct wave length. Bearings signaled as 
“approximate” oy “second class” should be regarded with sus- 
picion as being subject to considerable:error. 

Wave lengths—All independent and group radiocompass stations 
keep watch on 800 meters. Only this wave should be used to call 
and work with these stations. 

Hours of service-—During the first 10 minutes of each hour dur- 
ing clear weather radiocompass stations ordinarily will not be guard- 
ing the 800-meter wave. Ships are requested to confine their re- 
quests for bearings during clear weather to the remaining 50 minutes 
of the hour, if practicable. If a station chances to hear a request 
for a bearing during the first 10 minutes of the hour, the requested 
bearing will be given. During the remaining 50 minutes of the hour 
and at all times during inclement weather all radiocompass stations 
will be continuously guarding the 800-meter wave. 

Calling a radiocompass station—To obtain a bearing from inde- 
pendent radiocompass stations, call the station from which the bear- 
ing is desired in the usual manner and request bearings by means 
of the conventional signal given hereafter. Simultaneous bearings 
from two or more compass stations can be obtained by making the 
call include the other compass stations desired. To obtain bear- 
ings from the harbor entrance compass stations, carry out the pro- 
cedure previously given. ‘The compass control station only will 
answer. 

Conventional signals —The following abbreviated signals will be 
used : 


Signal Meaning 


YS EVA I Nea es eee What is my true bearing? 


0 BSL OTE 2 LE Ta Sk Your true bearing from _____- radiocompass station was ___.-_- degrees. 


+ 


The following radiocompass stations will be of use for vessels 
approaching the west coast of the United States. In plotting bear- 
ings furnished by these stations the position of receiver must be 
used. Vessels equipped with a radiocompass may also use these sta- 
tions as radio beacons. For this purpose a United States naval sta- 
tion will transmit, upon request, its call letter for 45 seconds on 
800-meter wave. When the bearing is taken on the vessel, the 
position of transmitter rust be used for plotting. 


Position of trans- 


Position of receiver mitter 


Station Call os PY yrdlen eh ees ee he 
letters | bration 
Latitude Longitude | Latitude |Longitude | P™84° 
north west north west 

Ook nie Pees a A Once ese Degrees 

Pachena Point, Vancouver-..........----- VAD (48 44 “125 Gm ree Se rie tow len ae 
Cattle Point, 1S eps id a NFN (48 27 05122 57 45) 48 27 17/122 57 41} 120-280 
Smith Island, BVA Eee torr coi Pan a eS NFH 48 19 04122 50 39} 48 19 12/122 50 35) 0-360 
New Dungeness, VSS] oT ats lr Be Pe NFT (48 10 32123 07 56) 48 10 26/123 08 06] 240-115 
ravoosh Island pVWVasn. 2.202. NPD (48 28 41/124 44 13] 48 23 28/124 44 04; 180-90 
Destruction Island, Wash__........__---- NOJ (47 40 29124 29 02) 47 40 30/124 29 30)---..-.. 
Klipsan Beach Wash Meee Ae epee oe NZS (46 27 53) 124 03 16] 46 27 54/124 03 11] 195-340 
Fort Stevens, Oreg...---..--..--.-.-..-- | NPE 46 11 32123 59 15) 46 09 12123 49 36) 175-335 
PUTO THEG MOT Omen nets tee Le a NPF 43 23 03/124 18 58) 48 20 38/124 13 36) 2380-10 
BLucrooreerPomb ost oo. oes 2! NY Wi ety 47a: 00124 pi bm Ob se Se ue ai ae ar 178-10 
1 OL TER TS ere ROUT VY, Ot 2 ee NPW (40 41 49 124 16 33) 40 41 45/124 16 19} 204-10 
POMPE YOS CUAlinas ces sta oS NLG (88 02 13122 59 36) 38 02 10/122 59 36 210-2 
OMEN Lontara-.Calif2s eo NLH 37 32 02122 31 07| 37 32 04/122 31 05) 185-292 
Perauom isang (Calits oo once cn ee NPI (87 41 59122 59 56] 37 41. 52/128 00 00] - 0-360 
Point Arguello, OE i oe ee ee Te NPK 34 34 38120 38 32] 34 34 38]120 38 41] 170-360 
Point Hueneme, ‘Calif. .- .. 22... 2.5... | NMD (34 08 43119 12 30) 34 08 43/119 12 12) 135-305 
omteerntn calif. 2 es sa NPX 33 42 19118 17 37) 33 42 221118 17 36) 90-290 
POInGacOMma Call. ols Boe es ae NPL (32 42 21/117 15 17 Ne 44 15117 03 53 { 85-250 
Priperinioeeen, Olt) soo. NPL 82 35 ae 07 54 182-331 

} | 


1 Bearings entshea | in tha sector 232 to 264° should be used with caution ‘until Geterted dacelintines re 
been investigated. 

2 The San Francisco entrance stations are under the control of the Point Montara radio station. 

3 The calibrated area between 135 and 160° is overland, and bearings in this sector should, therefore, be 
used with caution until several months of checking have shown what accuracy may be expected there. 


Notrt.—The arc of calibration is a sector of the circle of which the compass coil at the radio station is the 
center; the bearings are from the station (clockwise). Compass bearings are reliable only when they fall 
within the calibrated arcs. 


PROCEDURE IN DETAIL 


(a) A ship calling the radiocompass station or compass-control 
station should make the abbreviation “qre?” (‘“ What is my true 
bearing?”) This request will be answered by the radiocompass sta- 
tion or control station, and when ready to observe the radio bearing 
it will send the signal on ” indicating to the ship to commence “ test- 
ing”; that is, rane ven its distinguishing signal for a period of 50 
seconds. The signal should be made slowly with the dashes consider- 
ably prolonged. 

(6) The testing should be made on 800 meter s, upon the comple- 
tion of which the ship should await reply from the radiocompass 
station. - 

(c) The radiocompass station or control station will then reply, 
repeating the abbreviation “qre” (“ Your true bearing from 

was — degrees ”), followed by the bearing in degrees 
given by a group of three figures 000 to 359, indicating the true bear- 
ing in degrees of the ship station from the radiocompass station, and 
then the time group giving the time of observations in local standard 


RA 


vivlay se veer age alee 


\ 


my | aye 2 tp 
ait Wea MI 

eh iy ay “On ide 
on WA oyiad, , BEER ye rae " ni iN 
da -dpihh Ag. Qed ods: mab Se, ‘7 
e Ne: fy site Saath USQISPNONG ¥ 
sites) yb ee aa ode a a el Vw at Se 

. ye eit rid & Yo ite. Bi Barseod. * 4 a gt itn i et : ie 
yi a Stee a A ny ate fyi Htc ee Fe fa ? Rahs 
ae nent vip agi af PH OBL 7 lot notin haa Se ia 3 aa 
iti 0 vei Ord rs obia dain no antariaieh ay uw labs dadt SAS, | na 

oF its Bak Phy WONT, 210 Pate eR it noi bee, Riese amie 


pu 25 oe 1D ph ighat saikiaat) | weed AF Bee Ho STH ee Tae (ee tro bree ae aN 4 a 
aim oti ayitwed | dose otterseds wits yc ane, 
Gi dosslve tern: 5 bat: srlommincizn re aie CY 8h ae 
ayia *b, wie’ gait alday est) | Iheew od bigore (5) 
Aiidye 2p, Wroren i HA tyieoos aio hin .aerars Hs 
oi acquetinnsd Lyre +0 wits to-Bre repeReuieg! at bith cori ‘Ny ve 
ane ne hil # walivta vi erat SIE LEO {> nhs ait ; hye re ay 
ba iit aii ABE: LOU eh) pe ie ffanl soe e Hitouh ube roe 
sen TTS. tA ey ; wl3 ride 2. 2254 j tie eos Ce toned vals : 
MATS. te ore ria stass ian. 2 “$s Sabian at baneth ene ape] j 
lp artis ks seapanesia Bigaesy >. auiined soe 4 
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¥ laporyert to ate TES qethay by si PPK ay hice ‘ 
kaos Blo say hy, fem, GE ae per aate ey, 


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time. In the case of more than one radiocompass connected by 
land line, only the station originally called will answer. This sta- 
tion will combine all the bearings taken by itself and associated 
stations into one message, which gives each bearing observed imme- 
diately after the name of the station making the observation. Al 
compass stations transmit on 800 meters. 

Danger from reciprocal bearings.—Attention is invited to the fact 
that when a single bearing is furnished there is a possibility of an 
error of approximately 180°, as the operator at the compass station 
can not always determine on which side of the station the vessel lies. 
Certain radiocompass stations, particularly those on islands or ex- 
tended capes, are equipped to furnish two corrected true bearings 
for any observation. Such bearings when furnished vessels may 
differ by approximately 180°, and whichever bearing is suitable 
should be used. (See table giving “arc of calibration.”) 

Caution.—Mariners receiving bearings which are evidently the 
approximate reciprocal of the correct bearing should never attempt 
to correct these bearings by applying a correction of 180°, as such 
correction would not include the correction necessary on account of 
deviation at the compass station. An error of as large as 30° may 
be introduced by mariners applying an arbitrary correction of 180° 
to such bearings. Vessels receiving bearings manifestly requiring 
an approximate 180° correction should request the other bearing 
from the radiocompass station if not previously furnished. 

Bearings, except in the case of approximate reciprocal bearings, 
should be accurate within 2° of arc, provided the transmitting equip- 
ment on board vessels is tuned sharply to 800 meters. Operators 
should use sufficiently wide coupling to obtain low decrement. If 
radio transmitters are not tuned sharply, it 1s difficult to obtain bear- 
ings that are sufficiently accurate for navigational purposes. When 
bearings from three or more compass stations are not over 2° of 
arc in error, but do not meet at a fixed point, the geometric center 
of the triangle formed by the bearings can generally be taken as the 
approximate position of the vessel. 

Mariners until thoroughly familiar with the system are advised to 
use radiocompass stations frequently, especially in clear weather, 
when positions of vessels can be accurately fixed in order to accustom 
operators to the procedure and to acquaint themselves with the 
degree of accuracy and dependability of bearings furnished by the 
radiocompass stations. 

Reports.—In order that the operation of shore radiocompass sta- 
tions may be checked, mariners obtaining bearings are requested 
to forward a brief report to the Director Naval Communications, 
Navy. Department, Washington, D. C., containing the following 
particulars: (1) Name of ship. (2) Name of radiocompass station. 
(3) Date and local standard time at which radio bearing was taken. 
- (4) Bearings given by radio station. (5) Estimated position of ship 
at above time and dates by methods other than radio. (6) The 
probable degree of accuracy of the estimated position. (7) Weather 
conditions at above time. (8) Remarks, if any. (9) Signature of 
master or responsible navigating officer. There is no charge for 
bearings furnished by the naval radiocompass stations. 


LS a ee = 


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Radio fog signals—The following radio fog signals are operated 
on the Pacific coast by the United States Lighthouse Service: 
Point Arguello Light Station (lat. 34° 34’ 38’’ N., long. 120° 38’ 


4 AN 1S Nee 
PeGM erCrICOt AtASNOS fOT 00 5 ee eo ee 60 seconds. 
Be eR Te Pere ese he Cie ye es ho gale ae 45 seconds. 
Point, Sur Light. Station. (lat. 36° 18’ 24’’ N., long. 121° 54’ 
037’ W.) : 
PonioLt mou two Gashes, and dot, foro. 00 ls 60 seconds. 
pense ER ne ee erin ett ee te ee eg 90 seconds. 


San Francisco Lightship (call letters WWBV) (lat. 37° 45’ 03’’ 
N., long. 122° 41’ 30’’ W.) : 


Pernt te eG Vote tit Lieeer LON ee ee 60 seconds. 

S| OE eg TE TS NS TNR ue Sa Ce lal AR DR PNY As Pe RP Lg of ae 60 seconds. 

Blunts Reef Lightship (call letters WWBU) (lat. 40° 26’ 04’’ / 
N., tong. 124° 30’ J4’’ W.): 

PRPS Sy ROE PETS GEC | Rie ah ge te 02 SAL AME A) ROLE MAROC Deoanek ARR 60 seconds. 

ee ee eee esa ahi eee bd ee oth lucene og alanine niga ac ota iniaouk 120 seconds. 


Cape Blanco Light Station (lat. 42° 50’ 15’’ N., long 124° 33’ 

OG) Wi) 

LaUuGeor one Cash and, one Got for. eu 60 seconds. 
I a TO ce se him me op tg ad rr acne he ns nee te ni 30 seconds. 
Columbia River Lightship (call letters WWBQ) (lat. 46° 11’ 

GSS Now tong 124° 11’ 04!’ W.): 

Pen OO ORGIES LOT eS oleae ip ia aetna mpage ates 60 seconds. 
Oe 2 IS soi ER ats as etn erat ANS te a Me 30 seconds. 
Swiftsure Bank Lightship (call letters WWBO) (lat. 48° 31’ 

44’’ N., long. 125° 00’ 00’’ W.): 

Beere eNO POaR Nes OL oa. malas UN ae 60 seconds. 
See Ra Ne ig eo tea ot as anh 30 seconds. 

These radio fog signals are intended for the use of vessels equipped 
with radiocompass. By reason of this radiocompass (also termed 
radio direction finder) the bearing of the radio fog signal station 
may be determined with an accuracy of approximately 2° and at 
distances considerably in excess of the range of visibility of the most 
powertul coast hghts. The apparatus is simple and may be operated 
by the navigator without the assistance of a radio operator or with- 
out knowledge of the telegraph code. The radio direction-finding 
apparatus consists of a radio receiving set, similar in operation to 
those used for radio telegraph or telephone reception, and a rotatable 
coil of wire in place of the usual antenna. By rotating the coil the 
intensity of the signal received from the transmitting station is 
caused to vary, and by noting the position of the coil when the 
signal is heard at its minimum intensity the bearing of the trans- 
mitting station is readily obtained. 

It is important to note that the bearing of an incoming radio wave 
is subject to errors not unlike the deviation of a magnetic compass. 
Those using radio direction finders on shipboard are cautioned to 
bear these errors in mind and to keep radiocompasses calibrated at 
all times. This may be done during clear weather by comparing 
the bearing obtained by radiocompass with the bearing determined 
by other methods in general use. All radiocompasses are subject to 
what is called “night effect,” an indeterminate error sometimes 
experienced near nightfall and sunrise. 

The signals from the lightships have definite characteristics for 
identifying the stations, as have the flashing lights and sound fog 
signals, and bearings may be obtained with even greater facility than 


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PRIORI, od) Sails jot Lomag pri, on, rast jwore Tels, srhrigeh 
bee oqniti fd BTL RE Bln} sp toy) Ape yRoecbn thai 
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Dae tat heetin8 POO vans went AS, bah" 1 chev’ ‘ i aailersls oft 
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my, Rhy tae an tres Re ey vnth gt i thu Ae4) \ , aie Mea iM 
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sight bearings on visible objects. Zhe radio fog signals are trans- 
mitted ona wave length of 1,000 meters, which is exclusively reserved 
for this purpose to avoid mterference. 

All ships and stations transmit continuously during thick weather 
and from 9 to 9.30 a. m. and 3 to 3.30 p. m. during clear weather. 
Blunts Reef, Columbia River, and Swiftsure Bank Lightships also 
transmit in clear weather for the first 15 minutes of each even hour 
from 10 p. m. to 6.15 a. m., all one hundred and twentieth meridian 
time. 

The light stations do not maintain radio communication. On the 
lightships the operators maintain watch on 600 meters for the first 
15 minutes of each hour from 8 a. m. to 9.15 p. m., one hundred and 
twentieth meridian time, except when radio fog signal is in opera- 
tion. Radio requests for special transmission of radio fog signals for 
a reasonable time from lightships for the purpose of checking bear- 
ings or calibrating the radiocompass should be made during such 
watch periods, using 600-meter wave. 

At about 8 a. m., 12 noon, and 8 p. m. daily each lightship will 
broadcast, on 600-meter wave lengths, weather reports pertaining to 
existing weather conditions in the immediate vicinity of the light- 
ship and will furnish such weather reports at other times to vessels 
requesting them. These reports cover only actual weather condi- 
tions, and forecasts can not be furnished. 

Masters of vessels making use of the radio fog signals transmitted 
during clear weather are requested to advise the Superintendent of 
Lighthouses, San Francisco, Calif., by letter if the increased service 
is of value to them and if they desire to have such service continued 
or extended to cover more frequent periods in the future. 

A general description of this method of navigation and the instru- 
ments required may be obtained from the Commissioner of Light- 
houses, Washington, D. C., upon request. The Bureau of Standards 
Scientific Paper No. 428, the Radio Direction Finder and Its Appli- 
cation to Navigation, may be obtained from the Superintendent of 
Documents, Washington, D. C., for 15 cents. 


Pace 380. 
The elevation of Pedra Blanca is 10 feet. - 


Pace 53. 
Araceli Reef is marked by a red nun buoy. 


Pace 55. 
Dumaran.—tLast sentence, the three buoys which were removed 
have been reestablished. 


Page 61. 
The buoy at the entrance to Balingasag Bay has been discontinued. 


Pace 68. 

San Antonio Bay.—Recent surveys show the existence of many 
dangers along the coast, both inshore and offshore. Mariners navi- 
gating this section should use only the latest editions of the charts 
and be guided by them. 


Pace 73. 
Balabac has been discontinued as a port of entry. 


Pace 77. 
The automatic acetylene light on Comiran [sland shows one white 
flash every second. 


Paar 82. 
King Roberts Reef—tIt is believed that this reef does not exist, 
and it has been expunged from the chart. 


Pace 89. 

A shoal with a least depth of 1 fathom of water was reported to 
exist 3 miles westward of Baja Point. A shoal area with a depth of 
214 fathoms and 4 miles long in an east and west direction has been 
reported to exist about 814 miles west of this point. 


Pace 94. 

An extensive shoal area approximately 3 miles wide and 23 miles 
long, which breaks in heavy weather, has been reported to exist 
about 7 miles westward of Long Point. It extends i a a northeasterly 
and southwesterly direction between latitudes 9° 35’ and 9° 592’ 
N. and longitudes 118° 07’ and 118° 23’ E. 


PAGE 95. 
It has been reported that Dry /sland, about 1 mile north of Hen 
and Chickens, is a rock which bares 2 feet at low water. 


Pace 104. 
Inlulutoe Bay—tUine 3, for “ Capaos,”’ read “ Enterprise”; line 
4. tor * 1,000,” read “1,038” line 5, for “1,216,” read “ 1,299.” 


Page 105. 

Cape Ross——Add the following paragraph : 

The bay southward of Cape Ross and between it and Black Head 
is deep and clear but is exposed to westward and southward. Bay 
Rock, near the head of this bay, is steep-to with a depth of 614 
fathoms 100 yards westward from it. 

The Bank.—Uine 8, strike out sentence beginning on this line and 
substitute the following: “ The shoalest of these, on which the depth 
is 634 fathoms, lies 1 mile within the edge of the bank in latitude 
11° 26’ N. and longitude 118° 58’ E., 27 miles from the nearest 
part of Palawan. The patches are nearly all steep-to with flat 
tops.” 


Paar 106. 

Malampaya Sound.—Uines 7 and 10, for “ Blockade Strait ” read 
“Worcester Strait.” 

Blockade Strait—Change name to “ Worcester Strait.” At end 
of first sentence insert, “which favors the Tuluran side of the 
strait.” 

Islands and dangers.—Diente Point is steep-to with a very narrow 
coral reef fringing the shore. A 234-fathom coral shoal of small 
extent, with 8 to 10 fathoms close to it, lies 1,800 yards 333° true 

90089—26——2 


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from Diente Point. The channel between the shoal and the poipt is 
deep and clear. Strike out last sentence and substitute the fo! jw- 
ing: “ Motch Island, % mile northeast of Diente Point, is 18% feet 
high and is wooded. It is surrounded and connected with the shore 
southward by a coral reef bare at low water on which lie several 
rocks visible at all stages of the tide. Another group of rocks, the 
highest of which is 15 feet, he on a reef about 250 yards northward 
of the island.” 7 

Tuluran Island is high, rugged, and heavily wooded. Line 3, sub- 
stitute heights of 1,311 and 1,331 feet for the two peaks mentioned. 
Line 5, for “'Tuluran Table” read “'Thumb Peak.” Laine 6, for 
“1,033 feet ” read “1,066 feet.” 

Peaked Islet is 270 feet high. The channel between this island 
and the shore reef is narrow and has a depth of about 2 fathoms. 


Pace 107. 

Pyramid Rocks—tUine 5, for “1 fathom” read “34 fathom.” 

Bolalo Bay—&A sunken coral reef extends about 800 yards out 
from the shore at the head of the bay. The anchorage is anywhere 
inside the bay in 16 to 18 fathoms, mud bottom. It is subject to 
strong gusts of wind during stormy weather. The bay can be 
entered by either channel, east or west of Cone and Largon Islands, 
giving the latter island a good berth to avoid the reef extending 
out about 300 yards. 


Pace 108. 

After information relating to Tenabian Island insert the follow- 
ing: 

Turung [sland is on the north side of the entrance to Turung Bay 
and about 14 mile south of Bullock Head, the extreme point of the 
peninsula dividing Taitai and Turung Bays. There is a detached 
coral shoal with a least depth of 234 fathoms 360 yards 74° true 
from the northernmost point of Turung Island and a pinnacle rock 
with a least known depth of 3 fathoms about 1,400 yards 53° true 
from Bullock Head. 

Eniaran Island.—There is a detached coral shoal with a least 
depth of 234 fathoms 312 yards 188° true from the westernmost point 
of this island. 


Pace 109. 

Alligator Bay—There is a large dark-colored rock with a least 
depth of 214 fathoms 1,480 yards 219° true from the westernmost 
point of Palcocoton Island. 


Pace 110. 

Derections.—There is a strong tidal current in and out of the sound 
which, with contrary winds, may cause heavy tide rips in Worcester 
(Blockade) Strait. : 

in entering from the north through Endeavor Strait a mid-channel 
course must be followed. There is a sharp turn when entering the 
narrowest part of the strait at Chase Head. Great care must be 
taken to avoid setting on to the shore reef, as there is considerable 
tidal current at times in this strait. This entrance is entirely prac- 
ticable for vessels of less than 1,000 tons and saves about 3 miles 
when coming from the northward. 


10 


Pace 111. 

Port Cataaba (Kataaba.)—Good, well-protected anchorage may 
be found in 5 to 7 fathoms, mud bottom, abreast of Pin Point. 
This anchorage is free from the dangerous winds blowing through 
the mountain passes at some of the other anchorages in this region. 
Care must be taken to avoid the shore reef that extends about 200 
yards northeast of White Point Island. These reefs are hard to see 
on account of the silt carried down by the Kataaba River. Fresh 
water can be obtained from the small stream eastward of the anchor- 
age. The Kataaba (Kataban) Rwwer is a fresh-water stream enter- 
ing at the southeast corner of the bay. The channel across the mud 
flats has a depth of about 3 feet. Inside the river a depth of 9 
feet can be carried for about 3 miles through mangrove and nipa 
swamps. 

Destacado FRocks.——These rocks are 20 and 12 feet high. There 
is a 34-fathom shoal 503 yards 226° true from the southwestern 
rock. 


Pace 112. 

Jip Rocks —A 2%4-fathom shoal lies 300 yards northeastward 
from these rocks. 

Pangulasian Island —Paragraph 2: Shoal water extends 100 yards 
off the southeast end of Popolcan Island. The channel between this 
island and the shore reef of Pangulasian Island is 300 yards wide 
with a depth of 18 fathoms. 


Pace 113. 

Bacuit Bay.—Paragraph 4: Strike out last sentence. Recent sur- 
veys have located several hidden dangers in the bay. 

Add the following new paragraphs: | 

The bay between Custodio Point and Flat Rock is entirely filled 
by coral reefs with a detached 14-fathom coral shoal midway and 
200 yards northward of the line joining the point and rock. The 
shore reef extends about 100 yards northeastward of Flat Rock, 
which 1s 24 feet high. 

White Rock, 75 feet high, lies on an extensive coral reef making 
offshore about midway between Flat Rock and Cudugman Point. 
The reef extends 400 yards eastward and northeastward, and a coral 
ridge extends 14 mile from this rock. 

Bigun Bay northward and Cudugman Bay southward of Cudug- 

man Point are both nearly filled with coral reefs. 
_ Inabuyatan Island—A group of shoals with a least depth of 5 
fathoms les from 1% to 1 mile northwest of this island. A 334- 
fathom coral shoal rising out of 16 fathoms 114 miles due west from 
this island is the most serious danger to navigation in Bacuit Bay. 
The bay mentioned in this paragraph is named Danet Bay. During 
the rainy season the streams flowing into this bay bring a large 
amount of silt, so that the coral reefs are hard to see. 

Malpacao Island.—There is well-protected anchorage in 6 to 7 
fathoms southeastward of this island. The available anchorage 
space is restricted by two shoals awash at low water and by the 
shore reef which makes off 400-yards from the south side of Cimi- 
naytoy Point. The approach to the anchorage is southward of 


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Malpacao Island, the channel being 600 yards wide between the 
island and the nearer reef awash. ‘There are reefs in the channel 
northeastward of the island, and it should not be attempted by 
strangers. 

Lagen Island—The south and east sides of the island are fringed 
with coral, and the channel to the eastward is nearly blocked by 
reefs. Strike out second paragraph and substitute the following: 
“Two coral reefs awash at low water lie nfidway between the south 
end of the island and Long Point. There is another reef awash 
14 mile southeast of the island with a 214-fathom shoal about mid- 
way between this reef and the island.” : 

Dibuluan Island.—This island is 545 feet high and has two prom- 
inent cliffs on the western side. The shore is fringed with coral, 
and a number of coral reefs, bare at low water, lie southward and 
westward of the island. , 


Pace 114. 

Above information relating to Cadlao Island insert the following 
new paragraphs: 

Depeldet Island, 234 feet high, lies on the edge of the shore reef 
about 1 mile northwest of Dilarog Point. It is an island at high 
water only, being connected at low water with the shore by a ridge 
of gravel and bowlders. A 2-fathom coral patch hes 1 mile north- 
west of Depeldet Island and the same distance south of Ipil Point. 
Another reef with a depth of 134 fathoms lies 1% mile eastward 
from the 2-fathom patch. 

Corongcorong Bay affords sheltered anchorage during northerly 
weather for small vessels calling at Bacuit. It is separated from 
Manmegmeg Bay by a wide coral reef extending out from the shore. 
Near the edge of this reef several coral bowlders bare about 2 feet 
at low tide. 

Ipil Point, the eastern entrance of Bacuit Bay, is fringed by a 
coral reef about 100 yards wide. This reef is steep-to and may 
be passed at a distance of about 300 yards by vessels going around 
to Corongcorong Bay. Northward of Ipil Point the land rises 
steeply to a peak 1,543 feet high. This is the highest point of a 
high ridge over 1 mile long and separated from the highland east- 
ae by a low valley, at the northern end of which is the town of 

acuit. 

Dilumacad Island, 780 feet high, is separated from Ubugun Point 
on Cadlao Island by a channel 600 yards wide with depths of 10 to 
12 fathoms. The east side of the island has a sand beach fronted 
by coral; the entire west side is overhanging cliffs. Two prominent 
needle peaks lie near the southern end of the island. (End of new 
paragraphs. ) 

Cadlao Island——Calaragnan Point on the west side and Abrupt 
Point on the east coast of this island are prominent objects. The 
channel southeastward of the island is 600 yards wide, deep and 
clear. Change paragraph 5 to read as follows: “The chart shows 
a 134-fathom patch nearly 1 mile southward of Cadlao Island, 
and also a patch with a depth of 714 fathoms 114 miles easterly 
from Miniloc Island.” 


12 


Pace 115. 

Fast Peak is 1,725 feet high. 

Emmit Island—rThis island is 190 feet high. Last paragraph, 
for “ Pasco Inlet” read “ Baratoan Bay.” 

Gemelos Islets—Cange name to “Bury Islets.” These are 60 
and 70 feet high. 


Pace 120. 

Tubbatha reefs are two dangerous reefs, separated by a deep chan- 
nel about 5 miles wide. The northeastern reef is oblong in shape 
_and incloses a body of water 2 miles wide and 5 miles long. In this 
lagoon there are depths of 7 to 10 fathoms, with mud bottom, but 
there are no passages through the barrier reef. Small launches 
may cross the reef at high tide. Deep water extends close up to the 
reefs, and there are no anchorages. 

As the result of recent extensive surveys by the Coast and Geo- 
detic Survey, the following dangers have been proven not to exist: 
Rubi Reef, Nicholson Shoal, and Rosalia Reef. They have accord- 
ingly been expunged from the chart. The correct position of Jessie 
Beasley Reef is latitude 9° 02’ 11’’, longitude 119° 48’ 40’’. 


Pace 121. 
The results of the recent survey show that Quesada or South 
Tubbataha Reef is nonexistent. 


Pace 123. 
In 1920 there were plenty of cattle on Cagayan Sulu Island, and 
they could be purchased at market prices. 


Pace 128. 

Agusan FRiver—The rear light of the entrance range has been 
destroyed and will not be rebuilt. The channel is changing con- 
stantly, and a pilot should be employed for entering. 


Pace 189. 
Murcielagos Bay.—The channel to the anchorage is marked by 
two red and two black buoys. 


Pace 142. 

Coronado Point.—A shoal with a least known depth of 134 fathoms 
lies 2 miles southwest of Coronado Point and 1384 miles offshore. 
There are several coral heads on the shoal, and a bank with 6 fath- 
oms of water over it lies 14 mile farther offshore. 


Pacer 148. 

The chart reference for Port Santa Maria, Panabutan Bay, and 
Sibuco Bay should be 4651. 

Dulunguin Point.—A. shoal, small in area, with a least depth of 
16 feet, les ;8, mile southward of Dulunguin Point. 

Panabutan Bay—tLine 8, strike out sentence, the latest chart, No. 
4651, confirms the report. 


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Paap 144. 

Caldera Bay.—Strike out last sentence and substitute the follow-. 
ing: A limited supply of coal is kept here. Add new sentence: 
Coconut oil tanks are visible from the eastward. 


Pace 145. 

The wharf at Zamboanga now has a depth of 22 feet along its. 
front with 15 to 17 feet along the side. The arrow of the tidal cur- 
rent indicator on the wharf at Zamboanga points with the current. 
The current’ sometimes forms an inshore eddy, and it is only when 
the arrow is strictly horizontal that it indicates the direction of the 
current well off the wharf. 

A second-class red nun buoy 126°, 437 yards from Zamboanga 
Light, marks the point of a shoal southeast of Zamboanga wharf. 


Pace 146. 
Little Santa Cruz Island.—Second paragraph, third line, for 
“framed ” read “ steel.” 


Pace 162. 
A second-class black can buoy, moored in 714 fathoms of water, 
marks the southeastern edge of Arayat Shoal. 


Pace 163. 

A third-class red nun buoy, moored in 6 fathoms of water, marks: 
the southern part of A/iddle Ree}. A beacon has been established by 
the Walter A. Smith Co. about 437 yards northwest of the shoalest 
part of the reef. 

A beacon established by the Walter A. Smith Co. marks the: 
northwest edge of Sibulan Reef. 

The reef making off Cambulong Point is marked by a beacon 
situated on its northern edge and about 4387 yards inside its outer 
extremity. 


Pace 167. 

A small bowlder-strewn reef surmounted by a rock awash at half 
tide les about 300 yards west of Paya Island. 

Piratas Rocks are reported to be covered on very high tides. 


Pacers 177-178. 

The two red and black horizontally striped buoys marking the 
shoal southward of Malabang and the Pinatayan Shoal have been. 
discontinued. 


Pace 181. 
Cotabato River entrance.—The light flashes white every 2 seconds. 


Pace 184. 

The steel frame tower for the antenne of the constabulary radio 
station is located 2,280 yards 173° true from the center of Lebak- 
Island. 


14 
Page 185. . 

The town of Balonga is locally known as Milbuk. The harbor to 
the eastward of Pola Point is best approached from the southeast, 
passing either inside or outside of the 134-fathom shoal. The area 
‘southward of Pola Point appears foul and bottom is visible. 


Pacer 192. | 
The fixed red light on the beach at Bolton has been discontinued. 


Paew 197. , 
Pavao—The fixed red light is now shown from a white steel 
structure on the beach about 400 yards southward of the wharf. The 
commanding officer of a United States Navy destroyer reports that 
he found good anchorage 300 yards off the wharf about 1 mile north- 
eastward from the town. The principal products are hemp, coco- 
nuts, and kapok. There are two hospitals and a sawmill here. 


Pack 208. 

Cape San Agustin.—An occulting white ight—thus, light, 12 sec- 
onds, eclipse 4 seconds every 16 seconds—visible 14 miles, is ex- 
hibited 132 feet above high water from a white steel frame structure 
erected on a bluff near the southern extremity of Cape San Agustin. 
Vessels rounding the cape should keep at least 114 miles off the light 
‘to clear the reefs. 

Malamaui Road.—A. coral shoal with 13 feet over it at mean lower 
low water bas been found in Malamaui Road, south of the western 
entrance to Port Isabela, 114 miles 238° true from Moro Island, 
right tangent. 


PacE 262. 

Port Holland.—Surveys to the westward of Maluso Bay, Basilan 
island, disclose the existence of a 3-fathom spot in latitude 6° 33.5’ 
N., longitude 121° 45.2’ E. It is covered with coral heads and should 
be avoided. A coral patch in latitude 6° 32.7’ N., longitude 121° 
45.4’ E. is covered with 114 fathoms of water. These are dangers 
to be avoided in passing from the vicinity of Mataja Island to Port 
Holland. Certain changes of names of islands westward of Maluso 
Bay will be made in future editions of charts to conform to local 
usage. The Basilan Lumber Co. has extended the wharf and made 
extensive improvements at the plant in Port Holland. The wharf 
has a face of about 450 feet with depth of 23 to 16 feet alongside, 
and they maintain a fixed red electric light at its western end. 


Pace 263. 

Apparently shoal water is reported to exist 17 miles westward of 
Katludlud Island. This may be an extension or an off-lying shoal of 
Favorite Bank. | 


Page 264. 
Pilas Island.—For 919 feet substitute 560 feet. 


Pace 267. 

Jolo Island, line 4, change to “rises 2,665 feet”; and, last line 
of same paragraph, “the only good watering place is at the town of 
Jolo; at other places it must either be had from the river at low 
tide or from wells.” | 


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15 


Pace 268. : 

Insert before “Dalrymple Harbor,” Bulicutin Anchorage and 
Patotol Bay afford good anchorage for small vessels not exceeding 
about 15-foot draft, being the best protected anchorages in the island 
of Jolo. Entrance to Bulicutin Anchorage in the daytime is quite 
feasible, as the water is clear and the edge of the reef is visible. 
There are no aids to navigation, and to attempt to enter at night 
would not be advisable. The channel from Bulicutin Anchorage 
into Patotol Bay is very narrow, crooked, and the water in it is 
discolored, so that passage through it by vessels of any size is prac- 
tically impossible until some aids have been placed. 

Dalrymple Harbor is the only well-protected anchorage for large 
vessels in the island of Jolo. 

The elevation of Z'ulayan Island is 527 feet. 


Pace 269. 
The P. D. rock shown on some charts 3 miles northeast of Gui- 
jangan Island does not exist. 


Pace 270. 

The wharf at Jo/o has been rebuilt of concrete. Vessels approach- 
ing this wharf must be careful to avoid the reefs on the northeast 
side. 

Tulian Island is 113 feet high, covered with brush and small trees. 


Pace 271. 

A shoal with a least depth of 4 fathoms lies 14 mile northwest of 
the northernmost point of Bubuan Island. 

The 8-fathom shoal formerly charted about 5 miles westward of 
Cabucan Island does not exist. 

Pantocunan Island.—Strike out the last sentence. 

Southwest coast of Jolo—Bunga Point.—Two shoals with 6 to 8 
fathoms lie about 1 mile offshore midway between Silangon and 
Bunga Points. There is a 5-fathom shoal 34 mile 320° true from 
Bunga Point. : 

Parang.—tThis village is the largest on the south coast of Jolo 
and is the business center of the most populous section of the 
island. It is the terminus of a fairly good automobile highway 
leading to Jolo and another to Jolo via Silangon. In addition to 
the houses mentioned there are several more substantial structures, 
including a market, school, and large Chinese general store having 
a galvanized-iron roof. ‘There is no shipping by water, all com- 
munication being by highway to Jolo. 


Pace 272. 

Strike out sentence beginning on line 1 and substitute the fol- 
lowing: “ Anchorage may be had in 9 fathoms about 34 mile from 
shore, close to some fish traps, with the galvanized iron roof in 
Parang bearing 10° true (8° mag.) and Tubingantan Point bear- 
ing 130 true® (128° mag.). The bottom is coral sand, and the 
anchorage is exposed during the southwest monsoon.” 

Line 15, for “ Mount Mabintan, 1,519 feet,” read “ Mount Talipao, 
1,532 feet.” 

_Maibun Bay.—Change name to Maimbung Bay. 


16 


Directions for Maimbung Anchorage.—Line 5, change sentence 
to read, “If this passage be taken Dry Bank should not be brought 
to bear west of north until after Marban Bank bears east in 
order to clear a 3-fathom spot southwest of Marban Bank.” Change 
last sentence of paragraph to read, “ When clear of the 3-fathom 
spot, steer to pass a little closer to Marban Bank than to Dry Bank 
to clear a 3-fathom spot off the south end of the latter.” 

Anchorage.—Add the following: “Smaller craft may anchor a 
little closer inshore directly off the mouth of the river in 7 fathoms, 
mud and sand bottom.” 


Pace 273. 

Teomabal Island.—lLine 4, for “114 miles” read “214 miles.” 

Patian and Lumbian Islands—The reef mentioned in the sec- 
ond paragraph is evidently the point of the reef extending south- 
eastward from Teomabal Island. 

Garcia Shoal.—For “1% mile” read “14 mile.” 

Pata Island.—Line 2, for “1,483 feet” read “1,385 feet.” Add 
the following: “The channel between Pata Island and Damocan 
Islet is clear and has a depth not less than 17 fathoms. 


Pace 274. 
Two miles southwest of the southwestern point of Bolipongpong 
island is a shoal with a least depth of 214 fathoms. 


Pace 286. 
Port Bongao.—A standard concrete beacon with a fixed red light 
marks the extremity of the reef which extends out into the channel. 


Pace 291. 

The small island lying 9 miles northward of Kulassein, in latitude 
6° 35’ N., longitude 120° 41’ E., marked “ E. D.,” is nonexistent. 

Recent surveys in this region show important changes from the 
conditions previously charted. Use only the latest editions of charts 
Nos. 4722, 4707, and 4200. Sections of these charts showing the 
results of the surveys are included in Philippine Islands Notice to 
Mariners, No. 4, December 31, 1925. 


Page 292. 

A shoal with a least depth of 114 fathoms is reported to le in the 
channel between Basbas Island and Cunilan Islands, 2 miles north- 
eastward of Basbas Island. 


Pace 294. 

Pearl Bank.—A rock is reported to lie 7.7 miles 27° from Zau 
Island light. It is about 6 feet above water, the upper part white. 
Although it possesses a number of sharp summits, approached from 
the NW. or SE., it has the appearance of a solitary rock. From a 
distance it is reported to have the appearance of a number of small 
fishing boats with spread sails. Later reports question the exist- 
ence of this rock. 


Pace 303. 
Unsang Powmt is marked by a group flashing light visible 14 
miles. 


Sone WorWeieds Yo twins ed) br. 
y aan a sil to bia rene 


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Pace 306. 
Atjeh Rock is marked by a lighted buoy showing a white flash 
every 3 seconds. 


Pace 307. 

Sandakan.—A. depth of 314 fathoms exists alongside the outer 
end of the pier extending southeastward from the customs and 
harbor office at Sandakan. A depth of 214 fathoms exists along- 
side the center of the outer end of the pier about 150 yards south- 
westward of the first-mentioned pier. 


Pace 309. Re cht 
Taganak Island is marked by an unwatched flashing white light 
erected on its summit. 


Pace 310. 

A shoal with a depth less than 2 fathoms has been reported 
close eastward of the rock marked by a beacon about 2 miles south- 
ward of Lankayan Island. 


Pace 315. 
Fairway Shoal beacon has disappeared. 


Page 326. | 
A tripod beacon with globe top mark painted black and white: 
marks the northeastern side of Outer Shoal. 


Pace 3381. 
Sandilands Rock light shows a white flash every 3 seconds. | 


A flashing white light has been established on Kalampunian 
Island. 


PacE 339. 
Jesselton.—The light at the end of the main part of the pier is now 
fixed white. 


Pace 340. 
Substitute the following: 


COAST PILOTS AND FIELD STATIONS OF THE COAST AND GEODETIC SURVEY 
COAST PILOTS 
U. S. Coast Pilot, Atlantic Coast, Section A, froin St. Croix River to 


Capers Cog ain tie jo ial a 8 ne Re Raa a Y $0. 75: 
U. 8. Coast Pilot, Atlantic Coast, Section B, from Cape Cod to Sandy 


Hook, including Long Island Sound. _____________ ca i 6) 
U.S. Coast Pilot, Atlantic Coast, Section C, Sandy Hook to Cape Henry, 

including Delaware and. Chesapeake’. Bays. oo ee . 1 
U. 8. Coast Pilot, Atlantic Coast, Section D, Cape Henry to Key West___. .75 
U. S. Coast Pilot, Gulf Coast, Key West to the Rio Grande____________ . (5: 
U. 8. Coast Pilot, West Indies, Porto Rico, and Virgin Islands__________ . TS 
Inside, Route: Pilot, -coast:0f (New! Jersey (28 u i we a . 30 
Enside Route) Pilot, Key. York: to: Key West. 22200 ee . 30 
Inside Route Pilot, Key West to the Rio Grande______________-_______- . 50: 
U. S. Coast Pilot, Pacific Coast, California, Oregon, and Washington... .75 
U. 8. Coast Pilot, Pacific Coast, Alaska, Part I, from Dixon Entrance to 

Yak utat: Baye se ie Ti i cnn SS Sk ce yee 


U. S. Coast Pilot, Pacific Coast, Alaska, Part II, Yakutat Bay to Arctic 
COO TI TO SU ag SR PUR ato anes la cP 8 >  && 


POR HEC ENIOL Ta WALA) LBIAMOL?, ees a ee eS $0. 50 
U. §S. Coast Pilot, Philippine Islands, Part I, Luzon, Mindoro, and 

EE 8 acti SO8  aelt  EA UERRN D aa  wGlRE  eten = ME ep dea ead 75 
DD, S. Coast Pilot, Philippine Islands, Part II, Palawan, Mindanao, and 


eee SPLL STR DUELS SEIN Pe 120 a fe eng ae me pice go iie dion Sooner ent . 75 
FIELD STATIONS 


Boston, Mass., Appraisers Building, 308 Atlantic Avenue. 

New York, N. Y., 311-812 Maritime Exchange Building. 

New Orleans, La., Room 314, Customhouse. F 
San Francisco, Calif., Room 306, Customhouse. 

Seattle. Wash., Room 202, Burke Building. 

‘Manila, P. I., Intendencia Building. 


At these stations complete files of the United States Coast and Geodetic Sur- 
vey charts, Coast Pilots, Current Tables, Tide Tables, and other publications 
relating to navigation may be consulted and information affecting navigation 
obtained without charge. Light Lists, Buoy Lists, and Notices to Mariners are 
kept for sale or for free distribution to mariners. 


Pace 345. 

Fifth Signal—tines 2 and 3, for “south over west to north” 
read “north over west to south.” 

Eighth Signal.—Line 1, strike out words “strong winds.” 


O 


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I 


2 106202051 


